EGR Throttle Control Circuit B/Open
The drive circuit of EGR throttle B is open. EGR throttles partially close intake to increase exhaust gas recirculation flow at low loads.
Affected components
- Egr throttle b
- Egr actuator
Common causes
- High likelihood: Actuator winding open
Possible symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.